PROBLEMS OF PASSENGER AIRCRAFT DESIGN, TRACING TENDENCIES FROM THE PAST THROUGH THE PRESENT, AND PRESENTING FORECASTS FOR THE FUTURE ARE EXAMINED. PROBLEMS ARE APPROACHED PRIMARILY FROM THE STANDPOINT OF INCREASING ECONOMIC EFFECTIVENESS, WITH A GOAL OF IMPROVING PASSENGER-CARGO MIXES, OPERATING EXPENSES AND THRESHOLDS OF PROFITABILITY. THE WORK GOES INTO PROBLEMS OF DIFFERENT CONFIGURATIONS WITH RESPECT TO ENGINE PLACEMENT, ADVANTAGES OF DIFFERENT TYPES OF ENGINES, EMPENNAGE CONFIGURATION, LAYOUT OF PASSENGER AND CARGO SPACE AND THRUST- AND LIFT-TO-WEIGHT-RATIOS. THE MOST ATTENTION IS PAID TO STANDARD JET PASSENGER AIRPLANES AND AIR-BUSES, BUT SHORT TAKEOFF AND LANDING (STOL) AND VERTICAL TAKEOFF AND LANDING (VTOL) AIRPLANES ARE ALSO DISCUSSED WITH RESPECT TO THEIR USE IN RELATIVELY UNDEVELOPED AREAS.